They're running a Bob Graham Round, followed by cycling from John O Groats to Lands End, then finally kayaking from Devizes to Westminster. With the only breaks being their transfers.

You can find out more about their challenge hereL
http://theepictri.com/
and donate here:
http://uk.virginmoneygiving.com/fundraiser-web/fundraiser/showFundraiserPage.action?userUrl=theepictri&pageUrl=2